Mobile fitness system

ABSTRACT

The present application is directed to a mobile fitness system capable of being mounted to a vehicle rack. Components of the fitness system may be adjustably attached to the rack, providing for various free-hanging exercises, as well as allowing for attachment of various other fitness equipment. The fitness system may comprise extensions allowing groups of users to train simultaneously around the vehicle. The fitness system may also comprise a simulated door frame for attachment to a vehicle rack for supporting various home gym equipment that typically mounts to household doors. The fitness system may also comprise a spiral or semi-circular apparatus for performing body weight exercises at a plurality of angles. A plurality of hand grips may be attached to the apparatus, allowing a user to perform a variety of exercises at predetermined angles. The apparatus may be fixed to a vehicle rack to provide a portable training system.

RELATED APPLICATIONS

The present application is claims priority to and the benefit of U.S.Provisional Patent Application No. 61/526,445, entitled “Mobile FitnessSystem,” filed on Aug. 23, 2011, the entirety of which is herebyincorporated by reference.

FIELD OF THE INVENTION

The methods and systems described herein relate generally to fitnessequipment. In particular, the methods and systems described hereinrelate to a mobile fitness system for use with a truck rack or otherload carrying rack.

BACKGROUND OF THE INVENTION

Outdoor fitness training has experienced a recent surge in popularity,with “boot camp” programs simulating military basic training regimens.These programs frequently take place in public parks or elsewhere, andincorporate jogging or running, aerobic exercises such as jumping jacksor rope skipping, and bodyweight exercises such as push-ups, squats, leglunges, and sit-ups. However, while some cities have provided fixedstructures in parks for performing pull-ups or other exercise routines,such equipment is not widely available, limiting the variety ofexercises that may be performed.

Similarly, not everyone has access to a well-equipped gym, due tolocation or expense. While many advances have been made in home gymequipment, such devices typically are not highly portable, and thus maybe inadequate for the fitness needs of contractors or other professionswho frequently travel for work.

SUMMARY OF THE INVENTION

The present application is directed to a mobile fitness system capableof being mounted to a vehicle rack. Components of the fitness system maybe adjustably attached to the rack, providing for various free-hangingexercises, such as pull-ups, chin-ups, leg-ups, or tricep dips, as wellas allowing for attachment of various other equipment includingsuspension trainers, gymnastic rings, climbing ropes, heavy bags orpunching bags, or other equipment. The fitness system may compriseextensions allowing groups of users to train simultaneously around thevehicle. In another aspect, the present application is directed to asimulated door frame for attachment to a vehicle rack. The simulateddoor frame allows use of various home gym equipment that typicallymounts to household doors. In some embodiments, the simulated door frameincludes a vehicle tire stop. The vehicle may be moved to a position ontop of the vehicle tire stop, such that the vehicle's weight preventsthe simulated door frame from moving.

In still another aspect, the present application is directed to anapparatus for performing body-weight exercises at a plurality of angles.The apparatus may comprise a semi-circular frame or frame in the shapeof a portion of a Fibonacci spiral. A plurality of hand grips may beattached to the frame, allowing a user to perform a variety of exercisesat predetermined angles. The apparatus may be fixed to a vehicle rack toprovide a portable training system.

In one aspect, the present disclosure is directed to a mobile fitnesssystem for attachment to a vehicle accessory rack. The mobile fitnesssystem includes an extension rail for extending from a vehicle accessoryrack parallel to the ground to support a user performing free hangingfitness exercises. The system also includes at least one vertical riser,attached ventrally to the extension rail, each vertical riser having afirst predetermined height. The system further includes at least onefoot attached to and extending laterally from each corresponding riser,each said foot comprising a hole for attachment of the mobile fitnesssystem to the vehicle accessory rack via a fastener.

In some embodiments of the system, a first portion of the extension railhas a circular cross section. In other embodiments of the system, theextension rail includes a hole at a predetermined position for acceptinga hook attached to a fitness accessory. In a further embodiment of thesystem, the hole within the extension rail is not located at a pointalong the extension rail between a first vertical riser and a secondvertical riser.

In one embodiment of the system, the first predetermined height of eachvertical riser is selected to position the extension rail at a secondpredetermined height from the ground when attached to the vehicleaccessory rack. In another embodiment of the system, each at least onefoot further comprises a bolt for attachment via the hole to the vehicleaccessory rack. In yet another embodiment, the system includes a firstvertical riser attached to the extension rail at a first position, asecond vertical riser attached to the extension rail at a secondposition separated from the first position by a first predeterminedlength, and the extension rail is longer than the first predeterminedlength.

In another aspect, the present disclosure is directed to a mobilefitness system for attachment to a vehicle accessory rack. The mobilefitness system includes an extension rail for extending from a vehicleaccessory rack parallel to the ground to support a user performing freehanging fitness exercises. The system also includes at least one legattached to a terminal end of the extension rail and extending laterallyfrom the extension rail. The system further includes a mount forattachment to the vehicle accessory rack, attached to the extension railby a first joint. The mount includes an upright including the firstjoint, and a mounting plate attached to said upright, the mounting platecomprising at least one hole for attachment of the mobile fitness systemto the vehicle accessory rack via a fastener.

In some embodiments, the system includes at least two legs extendinglaterally at symmetrical angles from the extension rail to form anA-frame. In other embodiments, the system includes at least oneextension leg removably attached to each leg. In still otherembodiments, the system includes at least one foot attached to acorresponding leg, each foot comprising a plate fixed to each leg or acorresponding extension leg at an angle equal to an angle between saidleg or extension leg and a line perpendicular to the ground.

In some embodiments of the system, the first joint allows for onerotational degree of freedom at most. In other embodiments of thesystem, the first joint allows for one translational degree of freedomat most.

In one embodiment, the system includes a semi-circular fitness apparatusattached to the extension rail, the semi-circular fitness apparatusincluding at least two semi-circular rims, joined by a plurality ofcross bars. In a further embodiment, the semi-circular fitness apparatusfurther includes at least one pair of grips attached at correspondingpositions to each rim and extending laterally from said rim, each griphaving a circular cross section and diameter for grasping by a user'shand. In another further embodiment, each rim of the semi-circularfitness apparatus has a spiral profile. In still another furtherembodiment, the semi-circular fitness apparatus comprises a mountingplate attached to an upper terminal end of each rim for hooking over theextension rail.

In still another aspect, the present disclosure is directed to a mobilefitness system for attachment to a vehicle accessory rack and forsupporting a fitness apparatus configured for attachment to a door. Themobile fitness system includes an upper frame portion including a firsthorizontal beam, at least one vertical riser attached to the horizontalbeam, and at least one mounting plate attached to a correspondingvertical riser and extending orthogonally to the horizontal beam forattachment of the upper frame portion to a vehicle accessory rack via afastener. The system also includes a lower frame portion including asecond horizontal beam, and a tire receiving channel attached to thesecond horizontal beam for positioning beneath a vehicle tire, thechannel comprising a plate attached to the second horizontal beam at afirst edge and a backstop extending vertically from and attached to theplate at a second edge opposite the first edge.

In some embodiments, each of the first horizontal beam and secondhorizontal beam have a length and thickness equal to a correspondinglength and thickness of a standard door. In other embodiments, the tirereceiving channel further includes a vehicle stop extending verticallyfrom a third edge of the plate orthogonal to the first edge and secondedge.

The details of various embodiments of the invention are set forth in theaccompanying drawings and the description below.

BRIEF DESCRIPTION OF THE FIGURES

The foregoing and other objects, aspects, features, and advantages ofthe invention will become more apparent and better understood byreferring to the following description taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a perspective view of an embodiment of a vehicle rack;

FIGS. 2A-2D are front, side, top, and isometric views of an embodimentof an extension rail for supporting fitness equipment or for performingfree-hanging exercises;

FIG. 2E is a top view of an embodiment of the extension rail of FIGS.2A-2D installed on a vehicle rack;

FIG. 2F is a top view of an embodiment of the extension rail of FIGS.2A-2E positioned for transportation on a vehicle rack;

FIGS. 3A-3D are front, side, top, and isometric views of an embodimentof an A-frame extension for supporting fitness equipment or forperforming free-hanging exercises;

FIGS. 3E and 3F are side and end views, respectively, of an embodimentof extension legs for an embodiment of the A-frame extension of FIGS.3A-3D;

FIG. 3G is a perspective view of an embodiment of the A-frame extensionof FIGS. 3A-3D and extension legs of FIGS. 3E-3F;

FIG. 3H is an isometric view of an embodiment of a mount for an A-frameextension;

FIG. 3I is an isometric view of another embodiment of a mount for anA-frame extension;

FIG. 3J is a perspective view of an embodiment of an A-frame extensionand extension legs mounted to a vehicle rack;

FIG. 4A is a front view of an embodiment of a fitness apparatusutilizing a door for structural support;

FIG. 4B is an isometric view of a component of the fitness apparatus ofFIG. 4A;

FIGS. 5A-5D are front, top, bottom, and side views of an embodiment of asimulated upper portion of a door for supporting a fitness apparatus;

FIGS. 6A-6C are front, top, and end views of an embodiment of asimulated lower portion of a door for supporting a fitness apparatus;

FIG. 7 is a front view of an embodiment of the simulated upper portionof a door of FIGS. 5A-5D and lower portion of a door of FIGS. 6A-6Cinstalled on an embodiment of a vehicle rack, supporting an embodimentof a fitness apparatus;

FIG. 8 is a perspective view of an embodiment of a mobile fitnesssystem;

FIG. 9A is an illustration of use of an embodiment of a Fibonacci Wheelor semi-circular fitness apparatus;

FIG. 9B is a perspective view of an embodiment of a Fibonacci Wheel orsemi-circular fitness apparatus; and

FIG. 9C is a perspective view of an embodiment of a mobile fitnesssystem comprising an A-frame extension and a Fibonacci Wheel.

The features and advantages of the present invention will become moreapparent from the detailed description set forth below when taken inconjunction with the drawings, in which like reference charactersidentify corresponding elements throughout. In the drawings, likereference numbers generally indicate identical, functionally similar,and/or structurally similar elements.

DETAILED DESCRIPTION OF THE INVENTION

A mobile fitness system may comprise one or more modules capable ofmounting on a vehicle rack. The vehicle may comprise, for example, acontractor's work truck, or other vehicle. In one embodiment, thevehicle rack may be incorporated into the vehicle or part of thevehicle, while in other embodiments, the vehicle rack may comprise anadd-on rack. For example, in one such embodiment, a vehicle rack maycomprise any of the models of TracRac vehicle racks manufactured byTracRac, Inc. of Fall River, Mass.; any of the models of vehicle racksmanufactured by DeWALT Industrial Tool Co. of Baltimore, Md. such as theSteelTruss line of racks; any of the models of Xsportster truck racks byThule AB of Sweden; or any other type and form of vehicle rack.

For example, referring to FIG. 1, illustrated is a perspective view ofan embodiment of a vehicle rack 100, mounted on a pickup truck 112. Insome embodiments, a vehicle rack 100 may be mounted on other vehicles,including cars, flatbed trucks, vans, or other vehicles. In oneembodiment, a vehicle rack 100 may comprise horizontal sliding rails 102a-102 b (referred to generally as rails 102 or bed rails 102). One ormore rack bars 104 a-104 b (referred to generally as racks 104, rackbars 104, or load bars 104), may be mounted to rails 102. In manyembodiments, rack bars 104 may be slidingly positioned on rails 102 andlocked or clamped into place via locking mechanisms 110.

A rack bar 104 may comprise a pair of uprights 108 and a cross bar 106a-106 b (sometimes referred to as a cross bar 106, load bar 106, andsometimes referred to as rack bars).

In some embodiments, a rack bar 104 may comprise one or more additionalsupports, such as diagonal supports, to prevent torsion or otherwisesupport heavier loads. In some embodiments, a rack bar 104 may includecleats or other mounting hardware. In many embodiments, rack bars 104may have user-adjustable heights, such that cross bars 106 may bepositioned at variable distances from the ground. In some embodiments,the height may be continuously variable, while in other embodiments, theuser may select from a plurality of predetermined heights. For example,uprights 108 may include one or more pre-drilled holes, a sliding upperportion, and a locking pin for locking the sliding upper portion intoplace via one of the pre-drilled holes.

As shown in FIG. 1, in many embodiments, horizontal cross bars 106 areat a substantial height from the ground, frequently above head level,but typically within arm's reach from the ground. Accordingly, a lateralextension at or above the level of cross bars 106 may enable a user tohang from the bars and perform various free-hanging exercises, such aspull-ups. Furthermore, other exercise equipment may be hung from suchlateral extensions, providing a variety of exercises. Referring now toFIGS. 2A-2D, illustrated are front, side, top, and isometric views of anembodiment of an extension bar or extension rail 200 for supportingfitness equipment or for performing free-hanging exercises. In briefoverview, extension rail 200 may comprise an extended rail 202,connected to one or more risers 204 a-204 b, each fast to a foot 208a-208 b. Feet 208 a-208 b may include a hole 206 a-206 b for fasteningthe extension rail 200 to a cross bar 106. In use, extension rail 200may attach to cross bar 106 or similar elements of a vehicle rack withtie-down screws or clamps, and may extend laterally outward and awayfrom the side of the bed of the truck, parallel with cross bar 106. Whenin position for use, extension rail 200 may allow for variousfree-hanging exercises, as well as, in some embodiments, the attachmentof still rings, ropes, and other suspension devices, such as the TRXSuspension trainer by Fitness Anywhere, LLC of San Francisco, Calif. Inother embodiments, extension rail 200 may be configured for attachmentof punching bags, heavy bags, pulleys and weights, or other devices,such as the Jungle Gym XT by LifelineUSA of Madison, Wis. When not inuse, extension rail 200 may be tied down to the rack longitudinallyparallel with the length of the truck bed.

Referring first to FIG. 2A and in more detail, an extension rail 200 maycomprise a horizontal beam or rail 202. Extension rail 200 may beconstructed of steel, iron, aluminum, or any other stiff and strongmaterial capable of supporting the weight of a user. In someembodiments, extension rail 200 may be constructed from wood or a hardplastic, such as ABS plastic. In some embodiments, extension rail 200 ora portion of extension rail 200, such as beam 202, may be solid, whilein other embodiments, the rail or beam may be hollow. For example, inone embodiment, beam 202 may comprise a tubular length of steel. Beam202 may be of any length sufficient to allow a user to hang freely whenextended past the side of a vehicle, such as one foot, two feet, fourfeet, six feet, or any other length. Beam 202 may have any diameter orwidth, such as one inch, one and a half inches, two inches, four inches,six inches, etc. In one embodiment, beam 202 may have a diameter sizedto be grasped by a human hand.

In some embodiments, beam 202 may have a round cross-section, while inother embodiments, beam 202 may be square, hexagonal, octagonal, or anyother cross-section. In one embodiment, a first portion of beam 202,such as the portion attached to and between risers 204 a-204 b may havea first cross-section, such as square, while a second portion of beam202, such as the portion extending longitudinally from riser 204 b awayfrom riser 204 a, may have a second cross-section, such as octagonal.This may be done for ease of manufacture or welding to risers, whilesimultaneously providing a comfortable grip for a user's hand. In someembodiments, beam 202 may have an end cap, preventing a user's hand fromsliding off the end of the beam while in use, as well as preventinginjury. In some embodiments, an end cap may be of a similar material tobeam 202 or may be incorporated into beam 202, such as a broadened orenlarged terminal portion of a few inches or less. In other embodiments,an end cap may be of a different material and may be placed over the endof the beam 202, such as a rubber cap.

In many embodiments, one or more holes may pass through beam 202 in oneor more predetermined positions for attachment of additional equipment.For example, beam 202 may include a lateral hole six inches from the endof beam 202 for accepting a hook attached to a chain of a heavy bag,such that beam 202 may support the bag in position for use. Holes may bevertical, horizontal, or in any other orientation. In other embodiments,additional equipment may be simply hung over beam 202, without requiringto be secured via a hole. In a further embodiment, said equipment mayinclude a clamp or other feature to secure the equipment to beam 202. Inanother further embodiment, beam 202 may have one or more projections orprotruding pins or similar features, preventing an item of equipmenthanging over the beam from sliding past the projection.

Extension rail 200 may comprise one or more risers 204 a-204 b, referredto generally as risers 204, attached to and extending ventrally frombeam 202. In one embodiment, extension rail 200 may have a single riserof sufficient length and strength to prevent rotation of beam 202 due totorque when in use. For example, the riser may be one foot long, twofeet long, or any other length. In other embodiments, as shown,extension rail 200 may comprise two or more risers 204. In suchembodiments, risers 204 may be of substantially shorter length whilestill preventing rotation when secured to a vehicle rack. Where multiplerisers are employed, risers may be of any spacing, such as six inchesapart, one foot apart, two feet apart, two and a half feet apart, threefeet apart, or any other distance.

As shown in FIG. 2B, risers 204 may, in some embodiments, be narrowerthan beam 202. In other embodiments, risers 204 may be of the same widthas beam 202 or wider. Risers 204 may be of any material, the same ordifferent from the material of beam 202. Risers 204 may be of anyheight, such as six inches, three inches, one foot, or any other height.In one embodiment, risers 204 may be of sufficient height to positionbeam 202 at a predetermined distance from the ground when positioned foruse on a vehicle rack.

In some embodiments, a riser 204 may be attached or fast to a foot 208a-208 b, referred to generally as a foot 208, which may extend laterallyfrom a terminal end of a riser 204. Foot 208 may further comprise one ormore holes 206 a-206 b, referred to generally as holes 206, forattachment via tie-downs or clamps to a vehicle rack. Holes 206 may bethreaded or unthreaded.

The diameter of holes 206 may be sized responsive to tie-down or clampfeatures of a vehicle rack. For example, in some embodiments, a vehiclerack cross bar may include threaded holes, and holes 206 may be ofsimilar diameter, allowing a bolt to be threaded through a hole 206 of afoot 208 and through a hole of the cross bar. In other embodiments, avehicle rack may utilize expandable clamps that may be positioned at anypoint along a cross bar, and hole 206 may be sized to allow use of saidexpandable clamps. In some embodiments, clamps may be provided withextension rail 200.

As shown in FIGS. 2B-2D, in some embodiments, feet 208 may extendlaterally past beam 202. In other embodiments, feet 208 may not extendbeyond beam 202. In still other embodiments, feet 208 may extend beyondbeam 202, but holes 208 may be placed in line with an axis of beam 202.Although both shown extending to a right side of beam 202, in someembodiments, feet 208 may extend laterally to a left side of beam 202,both sides of beam 202, or one foot 208 may extend laterally to a leftside while a second foot 208 extends laterally to a right side of beam202.

Referring now to FIG. 2E, illustrated is a top view of an embodiment ofthe extension rail of FIGS. 2A-2D installed on a vehicle rack andpositioned for use. As shown, in some embodiments, multiple extensionrails 200 a-200 d may be employed simultaneously. Although shownextending to a right side of vehicle 112, in some embodiments, extensionrails 200 may be extended to a left side of vehicle 112. In anotherembodiment, extension rails 200 may extended on both sides of vehicle112, allowing multiple simultaneous users. As shown, additional vehicleracks 104 a-104 d may be employed to provide support for correspondingrails 200 a-200 d. Two rails 200 may be employed simultaneously on anyone vehicle rack 104, with each extending laterally from a side ofvehicle 112. In some embodiments, pairs of extension rails 200 may beplaced approximately shoulder-width apart, allowing for pull-ups in aneutral grip, tricep dips, or similar exercises, or attachment of pairedequipment such as gymnastic rings.

Referring now to FIG. 2F, illustrated is a top view of an embodiment ofthe extension rail of FIGS. 2A-2E positioned for transportation on avehicle rack. As shown, when not in use, rails 200 a-200 d may be tieddown longitudinally parallel to the length of the vehicle. In someembodiments, as shown, a vehicle rack 106, such as rack 104 c may bemoved to allow feet 208 to be secured to the rack in position fortravel. In other embodiments, extension rails may include additional tiedown holes, such as holes through bar 202 between one or more risers204, such that the rail may be tied down via said hole when not in use.

Through the use of multiple extension rails 200, a large number of usersmay train simultaneously, either via single or paired extension rails,or equipment attached to said extension rails. To accommodate even moreusers, an A-frame extension may be employed. FIGS. 3A-3D are front,side, top, and isometric views of embodiment of an A-frame extension 300for supporting fitness equipment or for performing free-hangingexercises. Although discussed as an A-frame, in some embodiments, theframe may comprise an extension rail and single leg, or a plurality oflegs joined by a crossbar. Accordingly, rather than an A-frame,extension 300 may be an L shape, a D shape, an inverted-U shape, or anyother shape. In brief overview, an extension 300 may comprise a beam 302attached to one or more legs 304 a-304 b at a terminal end. Extension300 may be attached to a vehicle rack and extended longitudinally fromthe vehicle, allowing user by users at the rear of the vehicle, inaddition to the sides of the vehicle through use of extension rails 200.Additionally, while a significant portion of extension rails 200 may beinvolved in securing the extension rail to the vehicle rack, such as thelength of extension rail between risers 204 a-204 b, and may thus beunusable for fitness training, an extension 300 may have nearly all ofits length usable, allowing large groups of simultaneous users.

Still referring to FIGS. 3A-3D, and in more detail, an extension 300 maycomprise a beam 302. Similar to an extension beam 202, beam 302 may beof metal, wood, hard plastic, or any similar material. Beam 302 may haveany cross section, such as circular, square, octagonal, or any othershape. In some embodiments, a first portion of beam 302 may have a firstcross section, and a second portion of beam 302 may have a second crosssection. For example, a first portion for attachment to a vehicle rackmay be square, rectangular or flat, while a second portion for graspingby a user may be round. Beam 302 may be hollow, solid, or partiallysolid and partially hollow. For example, in some embodiments, beam 302may comprise a tubular steel beam. Beam 302 may be of any length, suchas five feet, six feet, seven feet, ten feet, or any other length. Insome embodiments, beam 302 may have a diameter capable of being graspedby a hand, such as two inches, three inches, or any similar size.Accordingly, in such embodiments, a user may utilize beam 302 forfree-hanging exercises. In other embodiments, beam 302 may have a largerdiameter for additional strength, and a user may attach additionalfitness equipment to beam 302 such as gymnastics rings. In someembodiments, similar to those discussed above in connection withextension rail 200, beam 302 may include one or more vertical orhorizontal holes for attaching fitness equipment, or one or moreprotrusions to prevent fitness equipment from sliding freely along thelength of beam 302.

Beam 302 may be fixed to one or more legs 304 a-304 b, referred togenerally as legs 304. In one embodiment, as shown in FIGS. 3C-3D, legs304 may extend at symmetrical angles from beam 302, forming an A framefor supporting beam 302 while preventing lateral movement of the beam.In some embodiments, legs 304 may be of any length. For example, in oneembodiment, legs 304 may be of very long length, such as seven, eight,or nine feet in length, supporting the beam 302 at or above head heightfrom the ground when in use. In other embodiments, legs 304 may besubstantially shorter, and may be joined in use to extension legs 306,discussed in more detail below, allowing for portability and storage.For example, legs 304 may be only one, two, or three feet in length, orany other length. In some embodiments, legs 304 may be hollow orpartially hollow for holding extension legs 306, discussed in moredetail below. Although illustrated in an A-configuration, in someembodiments, legs 304 may be attached to a crossbar (not illustrated)that may be attached to the terminal end of beam 302, forming aninverted-U or pi-shape. In other embodiments, a single leg 304 may beused to support beam 302. In a further embodiment, one or more ropes,straps, or cables may be attached to beam 302 and connected to stakes,weights, or other securing means to provide lateral tension to preventbeam 302 from moving, similar to tension methods used in securing tents.

Referring now to FIGS. 3E and 3F, illustrated are side and end views,respectively, of an embodiment of extension legs 306 a-306 b, referredto generally as extension legs 306) for an embodiment of the A-frameextension of FIGS. 3A-3D. FIG. 3G is a perspective view of an embodimentof the A-frame extension of FIGS. 3A-3D and extension legs of FIGS.3E-3F. Extension legs 306 may comprise a leg 308 a-308 b attached to afoot 310-310 b. Leg 308 a-308 b may be of similar material andconstruction as legs 304 of A-frame extension 300, but in manyembodiments, may be narrower in diameter. As shown in FIGS. 3F and 3G,extension legs 306 may be inserted into hollow ends of leg 304 for usein supporting beam 302 at an appropriate height from the ground, and maybe removed for portability and storage. In some embodiments, legs 304may be partially hollow or have a stop at a predetermined positionwithin the leg, such that an extension leg 306 may be inserted to aspecified distance. In another embodiment, legs 304 may have a partialcrimp at a predetermined position, preventing extension legs 306 fromsliding further into leg 304. In other embodiments, extension legs 306may be fully inserted in legs 304, such that extension legs areprevented from further travel by beam 302. In still other embodiments, aleg 308 may include a hole at or near a terminal end of the leg to besecured in place via a pin through a corresponding hole in leg 304. Instill other embodiments, leg 308 may include a threaded portioncorresponding to a threaded portion on the inside of leg 304, such thatthe extension leg may be screwed securely into position for use.

A foot 310 may be attached to a terminal end of a leg 308. In someembodiments, a foot 310 may be a flat plate angled to lie flat against asurface when A-frame extension is in use. In other embodiments, a foot310 may include a spike to be driven into soft ground. In still otherembodiments, a foot 310 may include a threaded portion or non-threadedportion sized to meet with a plate 312 a-312 b, referred to generally asplates 312. Plate 312 may comprise a plate for spreading force from anextension leg 306 over a larger area of ground. In some embodiments,plate 312 may be weighted, to prevent accidental movement of extensionlegs during use of the A-frame extension. In one embodiment, plate 312may include a textured or spiked portion, for increasing friction withthe ground while in use. In other embodiments, foot 310 may be sized tofit within a center hole of a disc weight or barbell plate. Barbellplates, which may be readily available, may then be used to secure theA-frame extension for use.

Beam 302 of an A-frame extension 300 may be secured to a cross bar of avehicle rack for use. Different mounts 314 may be used, exampleembodiments of which are illustrated in FIGS. 3H and 3I. Referring firstto FIG. 3H, illustrated is an isometric view of an embodiment of a mount314 a for an A-frame extension. In brief overview, in some embodiments,a mount for an A-frame extension may comprise an upright 320 attached toa mounting plate 316. Mounting plate 316 may have one or more holes 318a-318 b for clamps or threaded bolts for attachment to a vehicle rackcross bar. Upright 320 may, in some embodiments, include a hole 322 withan inner diameter sized to accommodate beam 302, supporting an end ofthe beam and preventing lateral motion. In other embodiments, as shownin FIG. 3I, upright 320 may include two arms 324, with each including ahole 326 for a pin. In such embodiments, beam 302 may have acorresponding hole, such that a pin may be slid through holes 236 andthe corresponding hole in beam 302, preventing any lateral orlongitudinal motion of beam 302.

Still referring to FIG. 3H, and in more detail, in some embodiments, amount for an A-frame extension may comprise an upright 320 attached to aplate 316. In some embodiments, upright 320 and plate 316 may form anL-shape or be attached at a 90 degree angle, while in other embodiments,upright 320 and plate 316 may be attached at any other angle. In manyembodiments, upright 320 and plate 316 may be formed from a single pieceof material, such as steel or iron, bent or cast in a bent shape.

In some embodiments, plate 316 may comprise one or more mounting holes318 a-318 b, referred to generally as mounting holes 318 or tie downholes 318. In some embodiments, tie down holes 318 may be threaded,while in other embodiments, tie down holes 318 may be unthreaded. Insome embodiments, and as discussed above in connection with mountingholes of extension rails, tie down holes 318 may be sized to accommodatebolts, knobs, clamps, or other tie down hardware for securing the mount314 to a crossbar of a vehicle rack.

In some embodiments, as shown in FIG. 3H, upright 322 may comprise ahole 322. In many embodiments, hole 322 may have an inner diameter ofslightly larger than an outer diameter of beam 302, allowing beam 302 tobe inserted into hole 322 to form a prismatic joint. Mount 314 may thenprovide vertical support for beam 302, as well as preventing lateraltranslation of the beam.

In other embodiments, as shown in FIG. 3I, upright 322 may include anotch or have two upper plates 324 spaced apart by at least a diameterof beam 302. Each plate 324 may include a hole 326 to allow a pin (notillustrated) to be slid through holes 326 and a corresponding holethrough beam 302 to form a hinged joint. Mount 314 may then providevertical support for beam 302, as well as preventing both lateral andlongitudinal translation of the beam. In some embodiments, as shown,each plate 324 may be of greater width than upright 322. In otherembodiments, upright 322 may be thicker, with the same thickness as eachplate 324. The latter embodiments may be heavier, but may also bestronger as well as cheaper to manufacture.

Referring now to FIG. 3J, illustrated is a perspective view of anembodiment of an A-frame extension 300 and extension legs 306 a-306 bmounted to a vehicle rack 104 b. As shown, extension legs 306 a-306 bmay be of sufficient length to support beam 302 parallel to the ground.Beam 302 may then be used for free-hanging exercises by multiple userssimultaneously, and/or may support one or more items of fitnessequipment including ropes, chains, rings, pulleys and weights, punchingbags or heavy bags, elastic bands, or any other type and form of fitnessequipment.

Other types of fitness equipment may also be supported by the mobilefitness system discussed herein. For example, referring briefly to FIG.4A, illustrated is a front view of an embodiment of a fitness apparatus400 utilizing a door 404 for structural support, such as the WeiderX-Factor Door Gym manufactured by ICON Health & Fitness of Logan, Utah;the Altus Home Gym manufactured by Altus Athletic Manufacturing Co. ofAltus, Okla.; the Home Gym System by American Fitness of Beaverton,Oreg.; or any other type and form of door-mounted fitness apparatus. Inbrief overview, a fitness apparatus 400 may comprise a plurality of doorframe supports 402 a-402 d, which may be connected by elastic cables 406through pulleys 408. A user may grasp handles 410 a-410 b to perform avariety of dynamic strength exercises. As shown in the isometric view ofFIG. 4B, each door frame support 402 a-402 d may comprise a U-shapedportion to be placed over or under the door 404 with the door providingsupport and tension to elastic cables 406. Fitness equipment of thissort may be used with the mobile fitness system via a simulated doorframe, fabricated to the same dimensions of an ordinary household door,but with an upper portion designed to attach to a vehicle rack, and alower portion designed with a receiving channel for the vehicle tire tobe driven over, anchoring the lower portion to the ground. Simulateddoor frames may be utilized on both sides of the vehicle simultaneously,providing capability for multiple users. When not in use, the upper andlower portion of the simulated door frame may be removed and easilystored and transported.

Referring now to FIGS. 5A-5D, illustrated are front, top, bottom, andside views, respectively, of an embodiment of a simulated upper portion500 of a door for supporting a fitness apparatus 400. In brief overview,the upper portion or top frame 500 may comprise a horizontal bar or beam502, attached to one or more vertical risers 506 a-506 b. Each riser 506a-506 b may be attached to a horizontal mounting plate 508 a-508 b witha channel to slide over a cross bar of a vehicle rack. Each mountingplate 508 a-508 b may include one or more tie down or mounting holes 510a-510 b for securing the top frame 500 to a vehicle rack. Beam 502 maybe fixed to a plurality of equipment attachment points 504 a-504 d.

Still referring to FIGS. 5A-5D and in more detail, a top frame 500 maycomprise a horizontal beam 502. Beam 502 may be wood, metal, plastic, orany other stiff material or combination of materials. In someembodiments, beam 502 may have a length equivalent to a standardhousehold doorframe, such as two and a half or three feet, while inother embodiments, beam 502 may be any other size, including larger orsmaller. In some embodiments, beam 502 may be the same thickness as astandard door, such as two inches, or may be thinner. In embodiments inwhich beam 502 is thinner than a standard door, top frame 500 mayinclude a plurality of attachment points 504 a-504 d or plates fixed tobeam 502 to add thickness and support door frame supports 402 of fitnessequipment 400. In other embodiments, beam 502 may be thicker than astandard door, and attachment points 504 a-504 d may comprise notches orindentations in beam 502, allowing attachment of equipment whilepreventing the equipment from sliding laterally across beam 502. In someembodiments, as shown, attachment points 504 a-504 d may extend lowerthan beam 502, providing a greater surface area for contact with doorframe supports 402 of fitness equipment, while reducing the weight oftop frame 500. Attachment points 504 a-504 d may comprise pairs for a“narrow” setting and “wide” setting for use of a door frame attachedfitness apparatus. For example, outer attachment points may be used fora wide setting, while inner attachment points may be used for a narrowsetting.

Top frame 500 may comprise one or more risers 506 a-506 b, referred togenerally as risers 506. Risers 506 may be attached to beam 502, and maybe of any height, width, or thickness. Risers 506 may be of wood, metal,plastic, or any combination of one or more stiff materials. In someembodiments, beam 502 and risers 506 may be cast or forged together,while in other embodiments, beam 502 and risers 506 may be welded,bolted, or otherwise fastened together. Risers 506 may provide avertical displacement from a vehicle rack cross bar, both to allowattachment of door frame supports 402 of fitness equipment at properheight and to prevent supports 402 from being obstructed by the rackcross bar.

Risers 506 may attach to one or more mounting plates 508 a-508 b,referred to generally as mounting plates 508. Mounting plates 508 may bewood, metal, plastic, or any combination of one or more stiff materialsfor attachment to a vehicle rack. In some embodiments, mounting plates508 may be flat, while in other embodiments, mounting plates 508 may benotched or have an inverted U-shape for sliding over and around avehicle rack cross bar. Mounting plates 508 may include one or moremounting or tie down holes 510 a-510 b for use of bolts, clamps, orother hardware to attach top frame 500 to a vehicle rack cross bar.Mounting holes 510 may be threaded or unthreaded. As shown, in manyembodiments, a top frame 500 may comprise two risers 506 and mountingplates 508 to attach to two vehicle rack cross bars, preventing theapparatus from rotating in use. Mounting plates 508 may of any length,width, or thickness sufficient to support top frame 500 in use.

Referring now to FIGS. 6A-6C, illustrated are front, top, and end viewsof an embodiment of a simulated lower portion or bottom frame 600 of adoor for supporting a fitness apparatus 400. In brief overview, a bottomframe 600 may comprise a horizontal beam 602. Beam 602 may be attachedto or comprise one or more attachment points 604 a-604 d. Beam 602 mayalso comprise or be attached to a vehicle tire receiving channel 606 foranchoring bottom plate 600 to the ground by positioning a vehicle tireon top of receiving channel 606. In some embodiments, receiving channel606 may comprise a stop 608 to prevent the vehicle from driving beyond apredetermined position over the channel 606, and may comprise a backstop610 to prevent the channel from sliding out from under the vehicle tire.

Still referring to FIGS. 6A-6C and in more detail, a bottom frame 600may comprise a horizontal beam 602. Beam 602 may be wood, metal,plastic, or any other stiff material or combination of materials. Insome embodiments, beam 602 may have a length equivalent to a standardhousehold doorframe, such as two and a half or three feet, while inother embodiments, beam 602 may be any other size, including larger orsmaller. In some embodiments, beam 602 may be the same thickness as astandard door, such as two inches, or may be thinner. In embodiments inwhich beam 602 is thinner than a standard door, bottom frame 600 mayinclude a plurality of attachment points 604 a-604 d or plates fixed tobeam 602 to add thickness and support door frame supports 402 of fitnessequipment 400. In other embodiments, beam 602 may be thicker than astandard door, and attachment points 604 a-604 d may comprise notches orindentations in beam 602, allowing attachment of equipment whilepreventing the equipment from sliding laterally across beam 602. In someembodiments, as shown, attachment points 604 a-604 d may extend abovebeam 602, providing a greater surface area for contact with door framesupports 402 of fitness equipment, while reducing the weight of bottomframe 600. Attachment points 604 a-604 d may comprise pairs for a“narrow” setting and “wide” setting for use of a door frame attachedfitness apparatus. For example, outer attachment points may be used fora wide setting, while inner attachment points may be used for a narrowsetting.

Beam 602 may be attached to a receiving channel 606, which may comprisea flat plate for a vehicle tire to be driven onto to anchor the bottomframe 600 to the ground. In some embodiments, channel 606 may be widerthan the width of a vehicle tire to allow a user to drive the vehicleonto the plate easily. In some embodiments, channel 606 may be boundedon one or more sides by a vehicle stop 608 and/or backstop 610. Vehiclestop 608 may comprise a wall, plate, or beam positioned at one end ofreceiving channel 606 to stop a vehicle tire from rolling off of channel606. In some embodiments, vehicle stop 608 may be metal, wood, plastic,or any combination of materials, and may comprise an upwardly-bentportion of a plate of receiving channel 606. In many embodiments,vehicle stop 608 may not be required to provide structural support toany other component, and so may be relatively thin. In otherembodiments, vehicle stop 608 may act as a brace for a backstop 610, andmay be thicker.

Backstop 610 may comprise a beam, plate, or wall to prevent receivingchannel 606 from sliding laterally from under a vehicle tire. In use,bottom frame 600 may be pulled outward by a user as various exercisesare performed. On some surfaces, such as grass, gravel, sand, or dirt,there is a possibility that channel 606 could be pulled from under thevehicle, releasing suddenly and causing injury. Backstop 610 preventsthis motion by acting as a stop against the vehicle tire.

Referring now to FIG. 7, illustrated is a front view of an embodiment ofthe top frame 500 of FIGS. 5A-5D and bottom frame 600 of FIGS. 6A-6Cinstalled on an embodiment of a vehicle rack, supporting an embodimentof a fitness apparatus 400. As shown, when positioned on a vehicle rackand beneath a vehicle tire, beams 502 and 602 may be parallel andseparated by the height of a door, providing attachment points 504 and604 at appropriate distances for use of fitness apparatus 400.

Referring briefly to FIG. 8, illustrated is a perspective view of anembodiment of a mobile fitness system employing multiple equipmentstations. As shown, extension bars and frames may be attached to thevehicle rack at multiple places, allowing for groups of as many asfifteen, twenty, or more users to simultaneously train in circuitfashion, rotating from one station to the next around the vehicle. Theequipment may be quickly broken down for travel and storage, allowingfor fitness training anywhere.

In addition to free-hanging, cable systems, and other exerciseapparatuses, the mobile fitness system may further comprise a FibonacciWheel, or semi-circular fitness apparatus to allow users to performpush-ups, inverted pull-ups, or other exercises at a variety ofpredetermined angles. Referring first to FIG. 9A, illustrated is a sideview of use of an embodiment of a Fibonacci Wheel or semi-circularfitness apparatus 900. A Fibonacci Wheel 900 may comprise a spiralcross-section along circular arcs from opposite squares of a Fibonaccitiling. The wheel may comprise multiple handholds or bars atpredetermined positions. By grasping these bars, a user 902 may performexercises at a variety of angles. For example, a user may perform apush-up on the ground with his or her arms at an approximately 90 degreeangle from his or her body. By grasping a bar elevated off the ground,the user may perform a push-up at a reduced angle of 60 degrees, 45degrees, or any other angle. This may be used to target different musclegroups, as well as reducing the difficulty. Alternately, in someembodiments, the user may place their ankles over a bar elevated fromthe ground and perform push-ups with their hands on the ground. Arm-bodyangles greater than 90 may be achieved in this fashion, increasing thedifficulty. Additionally, a user may perform a climbing exercise,climbing up and down along the wheel with alternating hands. Users mayalso perform pull-ups and tricep dips or other exercises.

Referring now to FIG. 9B, illustrated is a perspective view of anembodiment of a Fibonacci Wheel or semi-circular fitness apparatus 900.Although shown in a spiral, in many embodiments, the fitness apparatusmay have a circular or semi-circular cross section or profile. Wheel 900may have a large radius in many embodiments, such that a user hangingfrom the top of the wheel with arms outstretched may have their feet offthe ground.

Wheel 900 may comprise two or more rims 902 a-902 b, referred togenerally as rims 902. In some embodiments, rims 902 may be steel, iron,wood, plastic, or any other stiff material capable of supporting theweight of one or more persons. Rims 902 may be solid, hollow, or acombination of solid and hollow. In some embodiments, rims 902 maycomprise tubular steel elements, reducing weight while maintainingstrength. In many embodiments, rims 902 may be positioned wider thanshoulder height apart. In some embodiments, an upper terminal end ofeach rim 902 may include a plate, c-shaped portion, u-shaped portion, orsimilar feature for mounting to a horizontal bar such as an A-frameextension 300. In some embodiments, the mount may include one or moremounting holes to securely fasten rims 902 to the bar via bolts, pins,or clamps.

In some embodiments, rims 902 may be joined by one or more cross bars904. Cross bars 904 may provide structural strength and positioning tokeep rims 902 parallel, as well as providing grips for hands or bars forankles during push-ups or other exercises. Cross bars 904 may be wood,metal, plastic, or any other material, and may be welded, bolted, orotherwise fastened to rims 902. In some embodiments, cross bars 904 mayalso extend outward from rims 902 (not illustrated). In someembodiments, cross bars 904 may be round in cross section, while inother embodiments, cross bars 904 may be square, octagonal, or any othershape. In many embodiments, cross bars 904 may have a diameter sized forgrip by a user's hands. Although shown as straight bars, in manyembodiments, a cross bar 904 may have a bent profile or be fixed at anon-perpendicular angle to rims 902, allowing for push-ups and otherexercises with a more neutral, less supinated position of the user'swrists and forearms, reducing the risk of stress injury.

In some embodiments, rims 902 may also be attached to one or more grips906. In many embodiments, grips 906 may be similar in material, crosssection, and diameter to cross bars 904, but may not extend fullybetween rims 902. In many embodiments, as shown, grips 906 may alsoextend outward from rims 902, allowing for grips wider than the distancebetween rims 902. Due to the open space between each pair of grips 906attached to rim 902 a-902 b, a user may perform push-ups or otherexercises at extreme extensions, sometimes referred to as guillotinepush-ups, in which the user lowers his body past the plane between thehands. This may place extra stress on the shoulder muscles, for example.As discussed above in connection with cross bar 904, in variousembodiments, grips 906 may be straight, bent, perpendicular to rims 902,or non-perpendicular to rims 902.

Referring briefly to FIG. 9C, illustrated is a perspective view of anembodiment of a mobile fitness system comprising an A-frame extension300 and a Fibonacci Wheel 900. As shown, the wheel 900 may be installedconnected to a horizontal beam 302 of extension 300, providingcapability for users to perform a variety of exercises at predeterminedangles at any time, anywhere.

While various embodiments of the methods and systems have beendescribed, these embodiments are exemplary and in no way limit the scopeof the described methods or systems. Those having skill in the relevantart can effect changes to form and details of the described methods andsystems without departing from the broadest scope of the describedmethods and systems. Thus, the scope of the methods and systemsdescribed herein should not be limited by any of the exemplaryembodiments and should be defined in accordance with the accompanyingclaims and their equivalents.

1. A mobile fitness system for attachment to a vehicle accessory rack,comprising: an extension rail for extending from a vehicle accessoryrack parallel to the ground to support a user performing free hangingfitness exercises; at least one vertical riser, attached ventrally tothe extension rail, each vertical riser having a first predeterminedheight; and at least one foot attached to and extending laterally fromeach corresponding riser, each said foot comprising a hole forattachment of the mobile fitness system to the vehicle accessory rackvia a fastener.
 2. The mobile fitness system of claim 1, wherein a firstportion of the extension rail has a circular cross section.
 3. Themobile fitness system of claim 1, wherein the extension rail comprises ahole at a predetermined position for accepting a hook attached to afitness accessory.
 4. The mobile fitness system of claim 3, wherein thehole within the extension rail is not located at a point along theextension rail between a first vertical riser and a second verticalriser.
 5. The mobile fitness system of claim 1, wherein the firstpredetermined height of each vertical riser is selected to position theextension rail at a second predetermined height from the ground whenattached to the vehicle accessory rack.
 6. The mobile fitness system ofclaim 1, wherein each at least one foot further comprises a bolt forattachment via the hole to the vehicle accessory rack.
 7. The mobilefitness system of claim 1, further comprising a first vertical riserattached to the extension rail at a first position, a second verticalriser attached to the extension rail at a second position separated fromthe first position by a first predetermined length, and wherein theextension rail is longer than the first predetermined length.
 8. Amobile fitness system for attachment to a vehicle accessory rack,comprising: an extension rail for extending from a vehicle accessoryrack parallel to the ground to support a user performing free hangingfitness exercises; at least one leg attached to a terminal end of theextension rail and extending laterally from the extension rail; and amount for attachment to the vehicle accessory rack, attached to theextension rail by a first joint, and comprising: an upright includingthe first joint, and a mounting plate attached to said upright, themounting plate comprising at least one hole for attachment of the mobilefitness system to the vehicle accessory rack via a fastener.
 9. Themobile fitness system of claim 8, comprising at least two legs extendinglaterally at symmetrical angles from the extension rail to form anA-frame.
 10. The mobile fitness system of claim 8, further comprising atleast one extension leg removably attached to each leg.
 11. The mobilefitness system of claim 8, further comprising at least one foot attachedto a corresponding leg, each foot comprising a plate fixed to each legor a corresponding extension leg at an angle equal to an angle betweensaid leg or extension leg and a line perpendicular to the ground. 12.The mobile fitness system of claim 8, wherein the first joint allows forone rotational degree of freedom at most.
 13. The mobile fitness systemof claim 8, wherein the first joint allows for one translational degreeof freedom at most.
 14. The mobile fitness system of claim 8, furthercomprising a semi-circular fitness apparatus attached to the extensionrail, the semi-circular fitness apparatus comprising at least twosemi-circular rims, joined by a plurality of cross bars.
 15. The mobilefitness system of claim 14, wherein the semi-circular fitness apparatusfurther comprises at least one pair of grips attached at correspondingpositions to each rim and extending laterally from said rim, each griphaving a circular cross section and diameter for grasping by a user'shand.
 16. The mobile fitness system of claim 14, wherein each rim of thesemi-circular fitness apparatus has a spiral profile.
 17. The mobilefitness system of claim 14, wherein the semi-circular fitness apparatuscomprises a mounting plate attached to an upper terminal end of each rimfor hooking over the extension rail.
 18. A mobile fitness system forattachment to a vehicle accessory rack and for supporting a fitnessapparatus configured for attachment to a door, comprising: an upperframe portion comprising: a first horizontal beam, at least one verticalriser attached to the horizontal beam, and at least one mounting plateattached to a corresponding vertical riser and extending orthogonally tothe horizontal beam for attachment of the upper frame portion to avehicle accessory rack via a fastener; and a lower frame portioncomprising: a second horizontal beam, and a tire receiving channelattached to the second horizontal beam for positioning beneath a vehicletire, the channel comprising: a plate attached to the second horizontalbeam at a first edge; and a backstop extending vertically from andattached to the plate at a second edge opposite the first edge.
 19. Themobile fitness system of claim 18, wherein each of the first horizontalbeam and second horizontal beam have a length and thickness equal to acorresponding length and thickness of a standard door.
 20. The mobilefitness system of claim 18, wherein the tire receiving channel furthercomprises a vehicle stop extending vertically from a third edge of theplate orthogonal to the first edge and second edge.